Question

a) write the properties of ionic compound(any two)
b) explain the following processi) calcination ii) roasting
c) wt is thermit process​

Answer 1

Answer:

They form crystals. ...

They have high melting points and high boiling points. ...They have higher enthalpies of fusion and vaporization than molecular compounds.

..

2.Roasting is a process of heating the concentrated ore to a high temperature in presence of air. Generally, sulfide ores are roasted. Calcination is a process of heating ore in the absence of air to a high temperature but insufficient to melt the ore. Generally, carbonates and hydrated ores are calcined

3.Thermite is a pyrotechnic composition of metal powder, which serves as fuel, and metal oxide. When ignited by heat, thermite undergoes an exothermic reduction-oxidation reaction

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